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Cisco Web Security Appliance Decryption Policy Bypass Vulnerability (cisco-sa-20190206-wsa-bypass)

medium Nessus Plugin ID 133958

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Synopsis

The remote device is missing a vendor-supplied security patch

Description

According to its self-reported version, Cisco Web Security Appliance (WSA) is affected by a decryption policy bypass vulnerability. An unauthenticated, remote attacker can bypass a configured drop policy and allow unauthorized traffic onto the network. Please see the included Cisco BIDs and Cisco Security Advisory for more information

Solution

Upgrade to the relevant fixed version referenced in Cisco bug ID CSCvm91630

See Also

http://www.nessus.org/u?07bd84fe

https://bst.cloudapps.cisco.com/bugsearch/bug/CSCvm91630

Plugin Details

Severity: Medium

ID: 133958

File Name: cisco-sa-20190206-wsa-bypass.nasl

Version: 1.8

Type: local

Family: CISCO

Published: 2/25/2020

Updated: 6/3/2021

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.6

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2019-1672

CVSS v3

Risk Factor: Medium

Base Score: 5.8

Temporal Score: 5.1

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/h:cisco:web_security_appliance, cpe:/a:cisco:web_security_appliance, cpe:/o:cisco:web_security_appliance, cpe:/o:cisco:asyncos

Required KB Items: Host/AsyncOS/Cisco Web Security Appliance/DisplayVersion, Host/AsyncOS/Cisco Web Security Appliance/Version, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2/6/2019

Vulnerability Publication Date: 2/6/2019

Reference Information

CVE: CVE-2019-1672

BID: 106904

CWE: 400

CISCO-SA: cisco-sa-20190206-wsa-bypass

IAVA: 2019-A-0219-S

CISCO-BUG-ID: CSCvm91630